BaseSupportFragment

class BaseSupportFragment : BrandedSupportFragment

Known direct subclasses
BrowseSupportFragment

A fragment for creating Leanback browse screens.

DetailsSupportFragment

A fragment for creating Leanback details screens.

VerticalGridSupportFragment

A fragment for creating leanback vertical grids.


Base class for leanback Fragments. This class is not intended to be subclassed by apps.

Summary

Public functions

ProgressBarManager!

Returns the ProgressBarManager.

Unit
onCreate(savedInstanceState: Bundle!)

Called to do initial creation of a fragment.

Unit

Called when the view previously created by onCreateView has been detached from the fragment.

Unit
onViewCreated(view: View, savedInstanceState: Bundle?)

Called immediately after onCreateView has returned, but before any saved state has been restored in to the view.

Unit

Enables entrance transition.

Unit

When fragment finishes loading data, it should call startEntranceTransition() to execute the entrance transition. startEntranceTransition() will start transition only if both two conditions are satisfied:

Protected functions

Any!

Create entrance transition.

Unit

Callback when entrance transition is ended.

Unit

Callback when entrance transition is prepared.

Unit

Callback when entrance transition is started.

Unit
runEntranceTransition(entranceTransition: Any!)

Run entrance transition.

Inherited functions

From androidx.activity.result.ActivityResultCaller
abstract ActivityResultLauncher<I!>!
<I, O> registerForActivityResult(
    contract: ActivityResultContract<I!, O!>!,
    callback: ActivityResultCallback<O!>!
)

Register a request to start an activity for result, designated by the given contract.

From androidx.leanback.app.BrandedSupportFragment
Drawable?

Returns the badge drawable used in the fragment title.

Int

Returns the color used to draw the search affordance.

SearchOrbView.Colors?

Returns the androidx.leanback.widget.SearchOrbView.Colors used to draw the search affordance.

CharSequence?

Returns the title text for the fragment.

View?

Returns the view that implements TitleViewAdapter.Provider.

TitleViewAdapter?

Returns the TitleViewAdapter implemented by title view.

Unit
installTitleView(
    inflater: LayoutInflater,
    parent: ViewGroup,
    savedInstanceState: Bundle?
)

Inflate title view and add to parent.

Boolean

Returns true/false to indicate the visibility of TitleView.

View
onInflateTitleView(
    inflater: LayoutInflater,
    parent: ViewGroup?,
    savedInstanceState: Bundle?
)

Called by installTitleView to inflate title view.

Unit

Called when the Fragment is no longer resumed.

Unit

Called when the fragment is visible to the user and actively running.

Unit

Called to ask the fragment to save its current dynamic state, so it can later be reconstructed in a new instance if its process is restarted.

Unit

Called when the Fragment is visible to the user.

Unit

Sets the drawable displayed in the fragment title.

Unit

Sets a click listener for the search affordance.

Unit

Sets the color used to draw the search affordance.

Unit

Sets the androidx.leanback.widget.SearchOrbView.Colors used to draw the search affordance.

Unit

Sets title text for the fragment.

Unit
setTitleView(titleView: View?)

Sets the view that implemented TitleViewAdapter.

Unit
showTitle(flags: Int)

Changes title view's components visibility and shows title.

Unit

Shows or hides the title view.

From android.content.ComponentCallbacks
From androidx.fragment.app.Fragment
Unit
dump(
    prefix: String,
    fd: FileDescriptor?,
    writer: PrintWriter,
    args: Array<String!>?
)

Print the Fragments's state into the given stream.

Boolean
equals(o: Any?)

Subclasses can not override equals().

FragmentActivity?

Return the FragmentActivity this fragment is currently associated with.

Boolean

Returns whether the the exit transition and enter transition overlap or not.

Boolean

Returns whether the the return transition and reenter transition overlap or not.

Bundle?

Return the arguments supplied when the fragment was instantiated, if any.

FragmentManager

Return a private FragmentManager for placing and managing Fragments inside of this Fragment.

Context?

Return the Context this fragment is currently associated with.

CreationExtras

Returns the default CreationExtras that should be passed into ViewModelProvider.Factory.create when no overriding CreationExtras were passed to the ViewModelProvider constructors.

ViewModelProvider.Factory

Returns the default ViewModelProvider.Factory that should be used when no custom Factory is provided to the ViewModelProvider constructors.

Any?

Returns the Transition that will be used to move Views into the initial scene.

Any?

Returns the Transition that will be used to move Views out of the scene when the fragment is removed, hidden, or detached when not popping the back stack.

FragmentManager?

This function is deprecated.

This has been removed in favor of getParentFragmentManager() which throws an IllegalStateException if the FragmentManager is null.

Any?

Return the host object of this fragment.

Int

Return the identifier this fragment is known by.

LayoutInflater

Returns the cached LayoutInflater used to inflate Views of this Fragment.

Lifecycle

Returns the Lifecycle of the provider.

LoaderManager

This function is deprecated.

Use LoaderManager.getInstance(this).

Fragment?

Returns the parent Fragment containing this Fragment.

FragmentManager

Return the FragmentManager for interacting with fragments associated with this fragment's activity.

Any?

Returns the Transition that will be used to move Views in to the scene when returning due to popping a back stack.

Resources

Return requireActivity().getResources().

Boolean

This function is deprecated.

Instead of retaining the Fragment itself, use a non-retained Fragment and keep retained state in a ViewModel attached to that Fragment.

Any?

Returns the Transition that will be used to move Views out of the scene when the Fragment is preparing to be removed, hidden, or detached because of popping the back stack.

SavedStateRegistry

The SavedStateRegistry owned by this SavedStateRegistryOwner

Any?

Returns the Transition that will be used for shared elements transferred into the content Scene.

Any?

Return the Transition that will be used for shared elements transferred back during a pop of the back stack.

String

Return a localized string from the application's package's default string table.

String
getString(resId: @StringRes Int, formatArgs: Array<Any!>?)

Return a localized formatted string from the application's package's default string table, substituting the format arguments as defined in java.util.Formatter and format.

String?

Get the tag name of the fragment, if specified.

Fragment?

This function is deprecated.

Instead of using a target fragment to pass results, use setFragmentResult to deliver results to FragmentResultListener instances registered by other fragments via setFragmentResultListener.

Int

This function is deprecated.

When using the target fragment replacement of setFragmentResultListener and setFragmentResult, consider using setArguments to pass a requestKey if you need to support dynamic request keys.

CharSequence

Return a localized, styled CharSequence from the application's package's default string table.

Boolean

This function is deprecated.

Use setMaxLifecycle instead.

View?

Get the root view for the fragment's layout (the one returned by onCreateView), if provided.

LifecycleOwner

Get a LifecycleOwner that represents the Fragment's View lifecycle.

LiveData<LifecycleOwner!>

Retrieve a LiveData which allows you to observe the lifecycle of the Fragment's View.

ViewModelStore

Returns the ViewModelStore associated with this Fragment

Int

Subclasses can not override hashCode().

java-static Fragment
instantiate(context: Context, fname: String)

This function is deprecated.

Use getFragmentFactory and instantiate

java-static Fragment
instantiate(context: Context, fname: String, args: Bundle?)

This function is deprecated.

Use getFragmentFactory and instantiate, manually calling setArguments on the returned Fragment.

Boolean

Return true if the fragment is currently added to its activity.

Boolean

Return true if the fragment has been explicitly detached from the UI.

Boolean

Return true if the fragment has been hidden.

Boolean

Return true if the layout is included as part of an activity view hierarchy via the tag.

Boolean

Return true if this fragment is currently being removed from its activity.

Boolean

Return true if the fragment is in the resumed state.

Boolean

Returns true if this fragment is added and its state has already been saved by its host.

Boolean

Return true if the fragment is currently visible to the user.

Unit

This function is deprecated.

use onViewCreated for code touching the view created by onCreateView and onCreate for other initialization.

Unit
onActivityResult(requestCode: Int, resultCode: Int, data: Intent?)

This function is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

Unit

This function is deprecated.

See onAttach.

Unit

Called when a fragment is first attached to its context.

Unit

This function is deprecated.

The responsibility for listening for fragments being attached has been moved to FragmentManager.

Unit
Boolean

This hook is called whenever an item in a context menu is selected.

Animation?
@MainThread
onCreateAnimation(transit: Int, enter: Boolean, nextAnim: Int)

Called when a fragment loads an animation.

Animator?
@MainThread
onCreateAnimator(transit: Int, enter: Boolean, nextAnim: Int)

Called when a fragment loads an animator.

Unit
@MainThread
onCreateContextMenu(
    menu: ContextMenu,
    v: View,
    menuInfo: ContextMenu.ContextMenuInfo?
)

Called when a context menu for the view is about to be shown.

Unit

This function is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

View?
@MainThread
onCreateView(
    inflater: LayoutInflater,
    container: ViewGroup?,
    savedInstanceState: Bundle?
)

Called to have the fragment instantiate its user interface view.

Unit

Called when the fragment is no longer in use.

Unit

This function is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

Unit

Called when the fragment is no longer attached to its activity.

LayoutInflater
onGetLayoutInflater(savedInstanceState: Bundle?)

Returns the LayoutInflater used to inflate Views of this Fragment.

Unit

Called when the hidden state (as returned by isHidden of the fragment or another fragment in its hierarchy has changed.

Unit
@UiThread
@CallSuper
onInflate(
    activity: Activity,
    attrs: AttributeSet,
    savedInstanceState: Bundle?
)

This function is deprecated.

See onInflate.

Unit
@UiThread
@CallSuper
onInflate(
    context: Context,
    attrs: AttributeSet,
    savedInstanceState: Bundle?
)

Called when a fragment is being created as part of a view layout inflation, typically from setting the content view of an activity.

Unit
Unit
onMultiWindowModeChanged(isInMultiWindowMode: Boolean)

Called when the Fragment's activity changes from fullscreen mode to multi-window mode and visa-versa.

Boolean

This function is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

Unit

This function is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

Unit
onPictureInPictureModeChanged(isInPictureInPictureMode: Boolean)

Called by the system when the activity changes to and from picture-in-picture mode.

Unit

This function is deprecated.

androidx.activity.ComponentActivity now implements MenuHost, an interface that allows any component, including your activity itself, to add menu items by calling addMenuProvider without forcing all components through this single method override.

Unit
@MainThread
onPrimaryNavigationFragmentChanged(
    isPrimaryNavigationFragment: Boolean
)

Callback for when the primary navigation state of this Fragment has changed.

Unit
onRequestPermissionsResult(
    requestCode: Int,
    permissions: Array<String!>,
    grantResults: IntArray
)

This function is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

Unit

Called when the Fragment is no longer started.

Unit

Called when all saved state has been restored into the view hierarchy of the fragment.

Unit

Postpone the entering Fragment transition until startPostponedEnterTransition or executePendingTransactions has been called.

Unit
postponeEnterTransition(duration: Long, timeUnit: TimeUnit)

Postpone the entering Fragment transition for a given amount of time and then call startPostponedEnterTransition.

ActivityResultLauncher<I!>
@MainThread
<I, O> registerForActivityResult(
    contract: ActivityResultContract<I!, O!>,
    callback: ActivityResultCallback<O!>
)

Register a request to start an activity for result, designated by the given contract.

ActivityResultLauncher<I!>
@MainThread
<I, O> registerForActivityResult(
    contract: ActivityResultContract<I!, O!>,
    registry: ActivityResultRegistry,
    callback: ActivityResultCallback<O!>
)

Register a request to start an activity for result, designated by the given contract.

Unit

Registers a context menu to be shown for the given view (multiple views can show the context menu).

Unit
requestPermissions(permissions: Array<String!>, requestCode: Int)

This function is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

FragmentActivity

Return the FragmentActivity this fragment is currently associated with.

Bundle

Return the arguments supplied when the fragment was instantiated.

Context

Return the Context this fragment is currently associated with.

FragmentManager

This function is deprecated.

This has been renamed to getParentFragmentManager() to make it clear that you are accessing the FragmentManager that contains this Fragment and not the FragmentManager associated with child Fragments.

Any

Return the host object of this fragment.

Fragment

Returns the parent Fragment containing this Fragment.

View

Get the root view for the fragment's layout (the one returned by onCreateView).

Unit

Sets whether the the exit transition and enter transition overlap or not.

Unit

Sets whether the the return transition and reenter transition overlap or not.

Unit

Supply the construction arguments for this fragment.

Unit

When custom transitions are used with Fragments, the enter transition callback is called when this Fragment is attached or detached when not popping the back stack.

Unit
setEnterTransition(transition: Any?)

Sets the Transition that will be used to move Views into the initial scene.

Unit

When custom transitions are used with Fragments, the exit transition callback is called when this Fragment is attached or detached when popping the back stack.

Unit
setExitTransition(transition: Any?)

Sets the Transition that will be used to move Views out of the scene when the fragment is removed, hidden, or detached when not popping the back stack.

Unit

This function is deprecated.

This method is no longer needed when using a MenuProvider to provide a Menu to your activity, which replaces onCreateOptionsMenu as the recommended way to provide a consistent, optionally Lifecycle-aware, and modular way to handle menu creation and item selection.

Unit

Set the initial saved state that this Fragment should restore itself from when first being constructed, as returned by FragmentManager.saveFragmentInstanceState.

Unit
setMenuVisibility(menuVisible: Boolean)

Set a hint for whether this fragment's menu should be visible.

Unit
setReenterTransition(transition: Any?)

Sets the Transition that will be used to move Views in to the scene when returning due to popping a back stack.

Unit

This function is deprecated.

Instead of retaining the Fragment itself, use a non-retained Fragment and keep retained state in a ViewModel attached to that Fragment.

Unit
setReturnTransition(transition: Any?)

Sets the Transition that will be used to move Views out of the scene when the Fragment is preparing to be removed, hidden, or detached because of popping the back stack.

Unit

Sets the Transition that will be used for shared elements transferred into the content Scene.

Unit

Sets the Transition that will be used for shared elements transferred back during a pop of the back stack.

Unit
setTargetFragment(fragment: Fragment?, requestCode: Int)

This function is deprecated.

Instead of using a target fragment to pass results, the fragment requesting a result should use setFragmentResultListener to register a FragmentResultListener with a requestKey using its parent fragment manager.

Unit
setUserVisibleHint(isVisibleToUser: Boolean)

This function is deprecated.

If you are manually calling this method, use setMaxLifecycle instead.

Boolean

Gets whether you should show UI with rationale before requesting a permission.

Unit

Call startActivity from the fragment's containing Activity.

Unit
startActivity(intent: Intent, options: Bundle?)

Call startActivity from the fragment's containing Activity.

Unit
startActivityForResult(intent: Intent, requestCode: Int)

This function is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

Unit
startActivityForResult(intent: Intent, requestCode: Int, options: Bundle?)

This function is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

Unit
startIntentSenderForResult(
    intent: IntentSender,
    requestCode: Int,
    fillInIntent: Intent?,
    flagsMask: Int,
    flagsValues: Int,
    extraFlags: Int,
    options: Bundle?
)

This function is deprecated.

This method has been deprecated in favor of using the Activity Result API which brings increased type safety via an ActivityResultContract and the prebuilt contracts for common intents available in androidx.activity.result.contract.ActivityResultContracts, provides hooks for testing, and allow receiving results in separate, testable classes independent from your fragment.

Unit

Begin postponed transitions after postponeEnterTransition was called.

String
Unit

Prevents a context menu to be shown for the given view.

From androidx.lifecycle.HasDefaultViewModelProviderFactory
CreationExtras!

Returns the default CreationExtras that should be passed into ViewModelProvider.Factory.create when no overriding CreationExtras were passed to the ViewModelProvider constructors.

abstract ViewModelProvider.Factory!

Returns the default ViewModelProvider.Factory that should be used when no custom Factory is provided to the ViewModelProvider constructors.

From androidx.lifecycle.LifecycleOwner
abstract Lifecycle!

Returns the Lifecycle of the provider.

From androidx.savedstate.SavedStateRegistryOwner
abstract SavedStateRegistry!

The SavedStateRegistry owned by this SavedStateRegistryOwner

From android.view.View.OnCreateContextMenuListener
abstract Unit
onCreateContextMenu(
    p: ContextMenu!,
    p1: View!,
    p2: ContextMenu.ContextMenuInfo!
)
From androidx.lifecycle.ViewModelStoreOwner

Public functions

getProgressBarManager

Added in 1.1.0
fun getProgressBarManager(): ProgressBarManager!

Returns the ProgressBarManager.

onCreate

fun onCreate(savedInstanceState: Bundle!): Unit

Called to do initial creation of a fragment. This is called after onAttach and before onCreateView.

Note that this can be called while the fragment's activity is still in the process of being created. As such, you can not rely on things like the activity's content view hierarchy being initialized at this point. If you want to do work once the activity itself is created, add a androidx.lifecycle.LifecycleObserver on the activity's Lifecycle, removing it when it receives the CREATED callback.

Any restored child fragments will be created before the base Fragment.onCreate method returns.

Parameters
savedInstanceState: Bundle!

If the fragment is being re-created from a previous saved state, this is the state.

onDestroyView

fun onDestroyView(): Unit

Called when the view previously created by onCreateView has been detached from the fragment. The next time the fragment needs to be displayed, a new view will be created. This is called after onStop and before onDestroy. It is called regardless of whether onCreateView returned a non-null view. Internally it is called after the view's state has been saved but before it has been removed from its parent.

onViewCreated

fun onViewCreated(view: View, savedInstanceState: Bundle?): Unit

Called immediately after onCreateView has returned, but before any saved state has been restored in to the view. This gives subclasses a chance to initialize themselves once they know their view hierarchy has been completely created. The fragment's view hierarchy is not however attached to its parent at this point.

Parameters
view: View

The View returned by onCreateView.

savedInstanceState: Bundle?

If non-null, this fragment is being re-constructed from a previous saved state as given here.

prepareEntranceTransition

Added in 1.1.0
fun prepareEntranceTransition(): Unit

Enables entrance transition.

Entrance transition is the standard slide-in transition that shows rows of data in browse screen and details screen.

The method is ignored before LOLLIPOP (API21).

This method must be called in or before onCreate(). Typically entrance transition should be enabled when savedInstance is null so that fragment restored from instanceState does not run an extra entrance transition. When the entrance transition is enabled, the fragment will make headers and content hidden initially. When data of rows are ready, app must call startEntranceTransition to kick off the transition, otherwise the rows will be invisible forever.

It is similar to android:windowsEnterTransition and can be considered a late-executed android:windowsEnterTransition controlled by app. There are two reasons that app needs it:

  • Workaround the problem that activity transition is not available between launcher and app. Browse activity must programmatically start the slide-in transition.
  • Separates DetailsOverviewRow transition from other rows transition. So that the DetailsOverviewRow transition can be executed earlier without waiting for all rows to be loaded.

Transition object is returned by createEntranceTransition(). Typically the app does not need override the default transition that browse and details provides.

startEntranceTransition

Added in 1.1.0
fun startEntranceTransition(): Unit

When fragment finishes loading data, it should call startEntranceTransition() to execute the entrance transition. startEntranceTransition() will start transition only if both two conditions are satisfied:

  • prepareEntranceTransition() was called.
  • has not executed entrance transition yet.

If startEntranceTransition() is called before onViewCreated(), it will be pending and executed when view is created.

Protected functions

createEntranceTransition

Added in 1.1.0
protected fun createEntranceTransition(): Any!

Create entrance transition. Subclass can override to load transition from resource or construct manually. Typically app does not need to override the default transition that browse and details provides.

onEntranceTransitionEnd

Added in 1.1.0
protected fun onEntranceTransitionEnd(): Unit

Callback when entrance transition is ended.

onEntranceTransitionPrepare

Added in 1.1.0
protected fun onEntranceTransitionPrepare(): Unit

Callback when entrance transition is prepared. This is when fragment should stop user input and animations.

onEntranceTransitionStart

Added in 1.1.0
protected fun onEntranceTransitionStart(): Unit

Callback when entrance transition is started. This is when fragment should stop processing layout.

runEntranceTransition

Added in 1.1.0
protected fun runEntranceTransition(entranceTransition: Any!): Unit

Run entrance transition. Subclass may use TransitionManager to perform go(Scene) or beginDelayedTransition(). App should not override the default implementation of browse and details fragment.